Thanks for the replies, appreciated.
The 2 campers are about the same vintage at 10 years old.
Regarding CY being closed down, I personally don't see that as an issue from a backup point of view. If I were ever to have issues, I would still seek a solution locally even if they were in business. That said, I believe from what I've read, they are well built. Same for the AS, if I have issues, I'll try and fix it locally (if I can't do it myself).
I do take the point though that others might not be of the same opinion and that may well affect the resale value. Actually, I think the resale on the AS will be better based on their reputation as well.
The tropical roof is another thing of concern. The owner of the CY says it's not an issue as it has large windows / plenty of ventilation and he has never had heat issues.... But then he is tying to sell it😎
Again....thanks